Fluke 875 manual Cable Sealing, Specifications for Cable

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Victoreen 875

Operators Manual

NOTE

Under potential L.O.C.A. conditions of pressure and temperature, the cable may expand as much as 11 inches per 100 feet.

The distance from the pull box to the detector will be determined by the amount of flex hose used to seal the detector cables. Additional information is found in the paragraph below Cable Sealing and in CABLE- 877 and 878-12-3 procedures in Appendix B.

Once the cables have been pulled and tested, the pull box cover must be bolted shut. To bolt the pull box shut, follow the steps outlined in procedure 878-12-3 in Appendix B. Pull box material type and grade is 304 stainless steel.

Cable Sealing

In-containment cable is 878-1-9. This is special cable designed to withstand the potential high radiation that may exist following a L.O.C.A. or similar event. In order to withstand the high pressure and moisture generated during such an event, the entire cable length must be sealed so that moisture will not come in contact with the cable. Cable specifications are listed below.

Specifications for Cable 878-1-9

Conductor

#24 AWG, 19/36 Tinned Copper

Insulation

Tefzel (BIWF)

Shield

#36 AWG, Tinned copper brand, 90% Coverage

Jacket

Tefzel (BIWF)

Outside Diameter

0.250 to 0.295 in

 

(6.35 to 7.49 mm)

Impedance

75 ohms nominal

Capacitance

22 pf/ft nominal

Dielectric Strength

7000 V minimum

Operating Voltage

2300 V maximum

The following guidelines are based on the sealing method used during the qualification test. Stainless steel Flex Hose 878-12-30, ¾ inch diameter x 18.5 inches long (with welded Swagelok connectors) should be installed between the detector and pull box. Stainless steel tubing (¾ inch diameter) should be installed from the pull box to the penetration for each cable. If a common stainless steel tubing run is used, a one (1) inch diameter tube is recommended.

NOTE

Seismic support and the sealing technique at penetration vary with plant requirements. Techniques and materials used are the customer's responsibility.

Attach the stainless steel tubing to the pull box with compression fittings (¾ inch) and, after finger tightening, tighten at least 1-¼ turns. The flex hose connection at the pull box is installed in the same manner. The detector end of the flex hose is swaged to the cable connector backshell. This should not be

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Contents Victoreen High Range Containment MonitorFluke Biomedical Table of Contents Calibration and Test Procedures Specifications IntroductionGeneral Description Containment MonitorTemperature Operating 40 to 120F 4 to 49C Readout Module 876A-1High-Range Containment Monitor Detector Equipment OverviewRack Chassis Pull Box Assembly Cables/Connectors/PanelFlexible Tubing 878-12-30TAB Optional EquipmentHigh-Range Containment Monitor Typical Energy Response Curve Detector Typical Linearity Detector High-Range Detector, Recommended Installation Receiving InspectionProcedures, Warnings, and Cautions StorageBlank Installation InstallationReadout Module Pull BoxSpecifications for Cable Cable SealingCable and Wiring Installation Detector Test After InstallationSpecifications for Cable Detector Cable Inside ContainmentAncillary Wiring All Alarms on P2 Normal Operation Shelf StatePower Connections P1 Computer & RecorderOperation OperationVictoreen Functional Description Function DescriptionReadout Module 876A-1 Negative Power Supply FAIL/SAFE Comparison Circuit on Power Supply Board High Voltage Power Supply Normal Operation non-ECS TestOperation of High Voltage Supply During ECS Test High Alarm Circuit Alert Alarm CircuitRecorders and Computer Buffers Fail/Safe CircuitPen Clamp Panel Meter Action During ECS Test Meter at extreme lower end of scaleLow Voltage Ramp Generator Action of Green Safe/Reset Light and Alarm During ECS TestMonitoring Circuits of The ECS Board Block Diagram of ECS Test Safe/Reset Sub-circuits Muting Circuits of ECS BoardBlank Maintenance Maintenance, Calibration, and TroubleshootingCalibration Test Procedure TP876A-1-108 Troubleshooting Signal Input Circuit Mother Board P/N 876-1-78, Schematic 876-1-3APreamplifierIMeter Board P/N 876A-1-86, Schematic 876A-1-3E Rear PanelTP501 TP502 +6.3 Test Point Normal Channel TestMuting Stages of the Alarm Circuits High Alarm CircuitNormal Low Signal Level Channel Test ESC Board P/N 876A-1-92, Schematic 876A-1-3D Wave Shapes on the Electronic Check Source Board Overall Fail Circuitry Associated with the ECS Test Starting With Pins M and P on the Power Supply SchematicStarting With Terminal H on Relay Driver Board Outputs of U206 Pulse Generator on the ECS Board Operation of the Latch CircuitLatch Circuit Circuit assumed initially in Pass Condition Fail ConditionNOR Pin Voltage State CommentsCalibration and Test Procedures Blank Cable and Pull Box Procedures Cable and Pull Box ProceduresVictoreen Applicable Drawings Applicable Drawings and Bill of MaterialsDocument Number Description Detector Cable Out of Containment Applicable Bill of Materials Fluke Biomedical
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